CFFTP putfile error

Hi, I'm trying to use cfftp to put a file on our vendor's server.  I have the correct username/pasword -- I've access the site and put the file from command line and filezilla using the same credentials.  The file I'm trying to put does exist -- I've got a "cfif FileExists(ourfile) is "Yes"" before the cfftp command.  I can do a dir listing of the ftp site successfully.  but when I try a putfile command, I get

The system has attempted to use an undefined value, which usually indicates a programming error, either in your code or some system code.
Null Pointers are another name for undefined values

Any suggestions on what else I need to check?   I've tried adding a dummy connection name, transfermode, and port, but none made any difference.  I'm stuck.  I'm hoping someone is going to look at my code and immediately say "hey stupid, fix this..." and I can go on my merry way... Thanks.

<cfftp
username = "*****"
password = "*****"
server = "*****"
action = "putFile"
localFile = "#ourfile#"
remoteFile = "ONYXhrms.txt"
>